EP 4113035 A1 20230104 - FREEZING DEVICE, FREEZING SYSTEM, AND CONTROL METHOD OF FREEZING DEVICE
Title (en)
FREEZING DEVICE, FREEZING SYSTEM, AND CONTROL METHOD OF FREEZING DEVICE
Title (de)
GEFRIERVORRICHTUNG, GEFRIERSYSTEM UND VERFAHREN ZUR STEUERUNG EINER GEFRIERVORRICHTUNG
Title (fr)
DISPOSITIF DE CONGÉLATION, SYSTÈME DE CONGÉLATION ET PROCÉDÉ DE COMMANDE DE DISPOSITIF DE CONGÉLATION
Publication
Application
Priority
JP 2021110944 A 20210702
Abstract (en)
Provided is a freezing device (1) that can improve thermal efficiency even in a low outside air temperature and obtain necessary freezing performance. The freezing device includes: a compressor (3) configured to compress a CO<sub>2</sub> refrigerant; a gas cooler (5) configured to cool a CO<sub>2</sub> refrigerant discharged from the compressor (3); and a control unit configured to set a high-pressure target value of the CO<sub>2</sub> refrigerant so that the CO<sub>2</sub> refrigerant in the gas cooler (5) becomes subcritical and perform subcritical control when an outside air temperature is less than a first predetermined temperature, which is lower than the critical point of the CO<sub>2</sub> refrigerant, and a target evaporation temperature in an evaporator to which the CO<sub>2</sub> refrigerant cooled by the gas cooler (5) is guided via an expansion valve (7) is less than or equal to a second predetermined temperature.
IPC 8 full level
F25B 9/00 (2006.01); F25B 49/02 (2006.01)
CPC (source: EP)
F25B 9/008 (2013.01); F25B 49/02 (2013.01); F25B 6/02 (2013.01); F25B 2500/31 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/1933 (2013.01); F25B 2700/2106 (2013.01); F25B 2700/21151 (2013.01); F25B 2700/21152 (2013.01)
Citation (applicant)
Citation (search report)
- [A] WO 03019085 A1 20030306 - MAERSK CONTAINER IND AS [DK], et al
- [A] PUROHIT NILESH ET AL: "Energetic and economic analysis of trans-critical CO2booster system for refrigeration in warm climatic condition", INTERNATIONAL JOURNAL OF REFRIGERATION, ELSEVIER, AMSTERDAM, NL, vol. 80, 2 May 2017 (2017-05-02), pages 182 - 196, XP085130818, ISSN: 0140-7007, DOI: 10.1016/J.IJREFRIG.2017.04.023
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4113035 A1 20230104; EP 4113035 B1 20230927; EP 4113035 C0 20230927; JP 2023007844 A 20230119
DOCDB simple family (application)
EP 22181615 A 20220628; JP 2021110944 A 20210702